Oil cooler



April 10, 1934. T, P, CHA E 1,953,927

OIL COOLER Eii'ed March :51, 1950 2 Sheets-Sheet 1 April 10, 1934. CHASE1,953,927

OIL COOLER Filed March 51. 1930 2 Sheets-Sheet 2 3% w W 1 a W am?Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE 1,953,921 on. cootaaApplication March 31, 1930, Serial No. 440,375

3 Claims.

It is an object of this invention to provide simple and practical meansfor a direct utilization of engine-cooling water in the cooling oflubricant oil; and preferred embodiments of this in vention may involvean innovation in the construction of air-cooled radiators employingvertical water tubes;some or all of said tubes being extended through anoil cooler incorporated in said radiator.

From a slightly difierent point of view, this invention may be said tocontemplate an oil thermalizing unit which includes heat-exchange or oiltempering elements, such as the mentioned tubes, in which unit the oilis passed between numerous parallel partition plates adapted to functionas fins upon said heat-exchange elements,--fins external to said unitand internal thereto being preferably similar but differently .spaced.

Other objects of this invention, which need involve no change in theexternal form or the general appearance of a radiator organization of atype currently applied to automotive vehicles (the mentioned oil-coolerunit being preferably with which the mentioned vertical or other tubescommunicate by extending through parallel horizontal walls between whichnumerous heat conductive fin sheets are compactly disposed) may be bestappreciated by the following description of an illustrative embodimentthereof, taken in connection with the appended claims and theaccompanying drawings.

Figure 1 is a partial and diagrammatic side elevational view of anengine equipped with one form of a water cooling and oil coolingradiator organization illustrative of the present invention, parts beingbroken away.

Figure 2 is an enlarged partial sectional view, 4 with parts brokenaway, taken substantially as indicated by the line 22 of Figure 1.

Figure 3 is a partial section view, taken substantially as indicated byline 3-3 of Figure 2. ,Figures 4 and 5 are diagrammatic plan views.Referring to details of that embodiment of the present invention whichhas been chosen for purposes of illustration, an engine 11 is shown asprovided with cooling-water conduits l3 and 12 respectivelycommunicating with an upper tank 14 and a lower tank 15 comprised in aradiator organization 16 which includes parallel vertical tubes 1'7,extending between said tanks.

A pump 18 is shown as interposed in the conduit 12, to advance cooledwater from the tank 15 to the engine 11; and an oil cooler unit 19 isdisposed immediately above a lower water tankv shown as including anupper wall 20 and a lower wall 21, through both of which the tubes 17extend in such manner that one of said walls may be regarded as commonto said oil cooler and the lower water tank 15,--the tubes 1'? thusserving 50 as oil tempering elements.

In the present instance, the tubes 17 are shown as provided, externallyof the cooler 19, with spaced horizontal plates or sheets 22, commonlysoldered thereon and serving as air-cooled fins 5 to reduce thetemperature of said tubes and that of the water descending therethrough;and those portions of said tubes which extend into and through the oilcooler 19 are shown as provided with similar but shorter and moreclosely 7 packed parallel partition sheets or plates 23, to serve asheat transferring fins-the length of the last-mentioned 'sheets or finsbeing such as to leave what may be termed header spaces or 'maniioldspaces 24 at the respective ends of the oil cooler.

In the illustrated cooler unit 19, the respective walls 20 and 21,through which the substantially parallel water-cooling and oil-temperingtubes 17 extend, are shown as horizontal and as formed 30 of metalsheets which are so stamped or drawn orotherwise cupped as to cooperatein incidentally providing parallel front and back walls 25 and 25' andend walls 26 and 2'7 of said unit,- the mentioned back wall 25' beingshown as provided with an inlet fitting 28 and an outlet fitting 29opposite which the fln sheets 23 may be specially shaped or slightly cutaway as suggested at 30, Figure 2,-said sheets otherwise fitting snuglybetween walls 25 and 25'.

In assembling, so much of the described radiator structure as lies,during use, above the plate or wall 20 may be put together in any usualor preferred manner; and, whether or not the organization has beeninverted or otherwise specially oriented favorably to the positioning ofthe plate wall 20 upon the projecting tubes 17, the fin sheets 23 may beassembled directly thereon,-slight annular bosses, not shown, butoptionally formed adjacent the apertures and/or elsewhere incidentallyto the aperturing of the sheets, being preferably relied upon suitablyto space the same. The cupped or other lower" wall element 21 of oilcooler 19 may be then so applied as to leave fin sheets 23 compacted toa desired degree and the respective ends 17' of tubes 17 flush orprojecting slightly therethrough; and a cupped or other bottom element31, preferably adapted to receive the similarly no welding or otherknown means; but any solderterposed at some suitable ing within the oilcooler 19 may aim primarily at the promotion of heat interchange betweenmentioned parts. 4

Obviously either of the openings 28, 29 whether provided in a verticalwall 25 or elsewhere near the ends of the described unit, may serve asan inlet opening connected with any oilfeed conduit 32, the otheropening of said'unit being then connected with any oil delivery conduit33; and the latter may lead either to a suitable reservoir or directlyto engine bearings, as desired. In

the latter case, a pump interposed at any suitable point, as at 34, mayserve not only to advance the oil through the described cooler but todeliver the same therefrom under a predetermined pressure. Therelatively large crosssectional area of the cooler, .and the very ex-.

tensive heat-transfer surface provided therein by the fin sheets 23,between whose closely-opposed surfaces the oil must pass, are favorableto the capacity and efliciency of the described cooler,- preventing anystagnation of chilled superficial layers of oil; and, if desired, apressure-limiting by-pass return conduit 36 shown as controlled by anadjustable valve at 37, may be interposed between the conduit 32, and asump or other reservoir 38. A similar return conduit 39, valved at 40,is shown as conditionally connecting conduit 33 with sump 38. The valve37 being set at a little higher pressure than valve 40, when both areused, the oil brought to an optimum condition from either direction, maybe advanced to any pressure conduits 41, leading to bearings 42, eitherunder an invariable bearing pressure or under a pressure varied bymanual or other manipulation of valve 40,-adjusted with reference tothermal or other conditions; and excess oil, if pumped, may be returnedto reservoir 38'via either conduit 36 or conduit 39, a filter unit (notshown) being optionally inpoint.

One advantageous mode of operation of all mentioned parts has beenclearly indicated in connection with the description thereof; and, a1-though said description has included but one complete embodiment of thepresent invention, it will be understood not only that various featuresthereof might be independently employed but also suggests that pipes 32aand 33a, through which oil is sent to and from cooler 19a by pump 34a,may

be connected only with a reservoir such as a sump 38a, any desiredadditional means, such as a pump 34a, being used to deliver the temperedoil to bearings 42a via pipe 41a; and Figure 5 suggests adaptation of asingle pump 34b to serve the functions of both of the pumps 34a and34a,as by interposition of a pressure relief valve 43a in such a mannerthat, delivery of oil to bearings 42b being always provided for by pipe41b, excess oil may be conditionally circulated through "cooler 19b viaconduits 33b and 320; but the systems last referred to are obviouslycapable of use with other coolers.

I claim:

1. In an engine and lubricant cooling system: a tank comprised in aradiator organization for cooling water for an automotive vehicleengine, said tank having a set of water cooling tubes extending througha wall thereof; and an oil cooling chamber provided with an inlet and anoutlet enclosing portions of said tubes, said chamber being subdividedby parallel heat-transferring partitions between which said oil isadvanced from said inlet to said outlet.

2. In an engine lubricating system: a lubricant conditioning chamberprovided with an inlet and an outlet spaced apart; parallel temperingelements extending inwardly through a wall of said chamber; and spacedheat-transfer means disposed in parallel upon said elements within saidchamber, said heat-transfer means being partition plates which are soarranged as to provide header spaces opposite said inlet and saidoutlet.

3. Apparatus for cooling the engine cooling liquid and regulating thetemperature of the lubricant of a. liquid cooled internal combustionengine including means defining passages through which

